I am ready to have my T142 tube frame painted. When I go through old photos, I see various shades of grey - but that might also be because these photos are old and faded. Can you specialists please tell me, whether Lola used a specific gray at that time, perhaps expressed in todays "RAL" equivalent. I thought about RAL 7035 - but I'm not sure at all. Or did they just use what was available?